Metallic chair



y 1 w. s. FERRIS METALLIC CHAIR Filed Sept. 22, 1927 Nun/1M STERRI Patented May 7, 1929.

UNITED STATES WILLIAM S. FERRIS, OF ELKI-IART, INDIANA.

METALLIC CHAIR.

Application filed September 22, 1927. Serial No. 221,164.

This invention relates to improvements in metallic chairs and especially to those of the swivelling type and it consists of the matters hereinafter described and more particularly pointed out in the appended claim.

Among the objects of the invention is to provide a simple, strong andimproved construction for the seat frameas well as a novel arrangementof parts for rigidly securing said frame to the seat post.

These objects of the invention as well as others, together with the many advantages thereof will more fully appear as I proceed with my specification. In the drawings:

Fig. 1 is a vertical longitudinal section through the seat frame of a. chair embodying my invention.

Fig. 2 is a top plan View thereof.

Fig. 3 is a detail vertical section on an enlarged scale through one side of the seat frame as taken on the line 33 of Fig- 1.

As illustrated and described herein, the

improved construction is embodied in that.

type of chair which has become known as a correct posture chair but as will be apparent, said construction may also be enibodied in other types of chairs wherethe peculiar characteristics thereof makes it of advantage to do so.

Referring now in detail to that embodiment of the invention illustrated in the accompanying drawings, the chair which is made substantially all of metal, includes a supporting base 1 comprising a plurality of tubular metallic legs 2 2 the top ends of which are held in substantially closely grouped relation by top and bottom spiders 3 and 1 respectively, the bottom ends of said legs being bent to provide that spread necessary for stability. Said bottom ends of said. legs are provided with suitable casters 5 upon which the chair may s easily moved about.

In the top end of the standard and having frame is 'made of angle bar stock with the vertical flange thereof facing upwardly from the horizontal flange which in turn faces inwardly.

Connecting the said front and rear members of the seat frame is a metallic plate 18 of a width somewhat less than that of sa-id seat frame. Said plate includes a horizontally disposed mid-portion 14 and front and rear portions 15 and 16 respectively, inclined upwardlyin opposite directions and at slightly different angles and said frontand rear portions terminate in end flanges 15 and 1G respectively. Said flanges engage the underside of horizontal flanges of the frame members 10 and ll and are secured thereto in any suitable manner, asfor instance by spot welding. Disposed sub stantially centrally in said plate is a hole 17 of a size to permit the extension 7 of the post to pass therethrough. Before'the seatframe is mounted on the post, I place a bottom clamping plate 18 upon the post shoulder 8 and then apply a top clamping plate 19 to said mid port-ion 14 of the plate 18 after which I apply a nut 20 to said threaded extension. When said nut 20 is drawn tight, the clamping plates securely clamp the plate 13 to the seat post 6. By reason of the different angular inclinations of the plate parts 15 and 16 respectively, the seat frame is sli htly pitched downwardly toward the rear. 7

Associated with the seat frame thus described is a seat member or cushion 21.

Said seat memberor cushion which is removable with respect to the seat frame, rests upon the horizontal flanges of the seatframe members 10, 11 and 12 respectively and is confined against accidental displacement by the vertical flanges of the seat frame. Each side of the seat member or cushion is undercut at the bottom as indicated at 22 for a purpose later to appear.

Also associated with the seat frame is a suitable back rest arrangement which includes sidearins Qty-28 each of which is pivotally connected to the outside of the vertical flanges of the seat frame side members 1212 by a screw 24 that passes from the inside of the flange through any one of a number of holes 25 therein and into a threaded hole in the inside of said arm. The top ends of the side arms are connected together by a back rest bar 26 which carries a curved back rest member 27. The said.

arms are each held in the desired angular position by a brace arm 28, the top end of Which is bifurcated as at 29 to straddle and be pivotally connected to side arm as by a rivet 30. The bottom end of said brace arms are each pivotally connected to the outside of the Vertical flanges of the side members of the seat frame by a suitable screw 31 from the inside of said flanges, which screw may beengaged in any one of a number of holes therefor in the bottom ends of each brace arm. The screws 24; and 31 are large headed ones and as they are disposed on the inside of the vertical flanges of the seat frame side members they engage and are concealed Within the undercut portions 22 of the seat member or cushion 21 when the same is in place upon the seatframe. It is apparent from the foregoing description that the back rest may be adjusted forwardly or rearwardly as Well as vertically to bring the back rest into that position most convenient for the occupant.

The chair is indeed strong and simple in construction and the seat frame is rigidly secured to the post through the agency of a minimum number of parts which may be quickly assembled.

While in describing my invention I have referred in detail to the form and arrangement of the various parts thereof, 1 do not Wish to be limited thereto except as may be pointed out in the appended claim.

I claim as my invention:

in a chair, a rectangular seat frame comprising front, rear and side members made of angle bars having the horizontal flanges at the bottom and facing inwardly and with the vertical flanges facing upwardly, a back rest member associated with the seat frame and including a side arm and a brace arm associated with each side member of the seat frame on the outside thereof, headed screws extending through the vertical flanges of said side members from the inside thereof and into said side and brace arms, and a seat member removably seated on the horizontal flanges of said seat frame members, the side portions of said seat member being undercut to accommodate the heads of said screws.

In testimony whereof, I have hereunto set my hand, this 15th day of September, i927.

WILLIAM S. FERRIF 

